tdf#119882, don't change the chart model from the chart view

Change-Id: I1c909f6e1984bd4b09c3b67c19659dc276ac3229
Reviewed-on: https://gerrit.libreoffice.org/60984
Tested-by: Jenkins
Reviewed-by: Markus Mohrhard <markus.mohrhard@googlemail.com>

chart2/source/tools/AxisHelper.cxx

@@ -154,8 +154,6 @@ sal_Int32 AxisHelper::getExplicitNumberFormatKeyForAxis(
     xProp->getPropertyValue(CHART_UNONAME_LINK_TO_SRC_NUMFMT) >>= bLinkToSource;
     xProp->getPropertyValue(CHART_UNONAME_NUMFMT) >>= nNumberFormatKey;
 
-    sal_Int32 nOldNumberFormat = nNumberFormatKey;
-
     if (bLinkToSource)
     {
         bool bFormatSet = false;
@@ -329,9 +327,6 @@ sal_Int32 AxisHelper::getExplicitNumberFormatKeyForAxis(
                 }
             }
         }
-
-        if (nOldNumberFormat != nNumberFormatKey)
-            xProp->setPropertyValue(CHART_UNONAME_NUMFMT, uno::Any(nNumberFormatKey));
     }
 
     return nNumberFormatKey;